Improvement in crank-wrists



UNITED STATES PATENT OFFICE.

JOHN M. LONG, OF HAMILTON, OHIO.

IMPROVEMENT IN CRANK-WRISTS.

Specification forming part of Letters Patent No. 38,233, dated April 2l, 1863.

To all whom it may conce/ra:

Be it known that I, JOHN M. LGNG, of Hamilton,in the county ot' Butler and State ofOhio, have invented a new and useful Improvement in Cralik-VVrsts; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompan ying drawingand letters of reference, makin gpart of this specitication.

My invention relates to the construction of the crank wrist by which the pitman is connected with the crank; and it consists in the peculiar construction herein represented and described.

To enable others to make and use my invention, I will proceed -to describe it minutely.

In the accompanying drawing, A represents the crank orcrank-Wheel, thesame being shown on an axial plane. The crank-wrist and pitman are also shown in section upon the same plane.

aisthe eye of the crank-Wheel, which receives the driving-shaft.

B is abolt of suitable dimensions-say, onehalt' inch in diameter-passing through the crank in the place of an ordinary fixed crank- Wrist.

Y b is the head ando is the nut of the bolt.

O is the pitinan.

D is a metal ferrule or sleeve, surrounding bolt B, as shown. This ferrnle l prefer to cast in a chill, by which the outer periphery is rendered extremely hard, after which it is polished smooth with emery.

Surrounding the aperture in A, through which bolt B passes. an annular space, d, is formed, and into this aperture the ferrule D enters a short distance, as shown, the ferrule closely fitting the aperture. A round hole through pitman O,near its end,allows the pitman to be slipped over ferrule or sleeve D. The latter is to ll the hole in pitman nicely, but not so as to prevent its rotating freely therein. A thin Washer, e, surrounds the bolt B, andthe nut c, when screwed up tightly, contines the fer rule D firmly in its place. As will be seen,the ferrule D, en tering the recess d in the crankand contined by the bolt B, aords a large and secure crank-wrist of a very cheap and easy construction. Ihen Worn so as to become loose in the pitman, or it' broken by accident, it can be readily removed and a newone substituted. Being comparatively inexpensive,the operator may always have extra ferrules or bolts, it' necessary, at hand.

, The boltis ot' common construction; and the object of the invention is to provide a cheap, l

simple, and convenient substitute for the crankwrists ot ordinary construction, and to enable the operator to replace the Wrist in case of accident Without the delay and expense of sending frequently to a great distance to have 'the article made.

I do not claim making a crank-wrist simply with a lferrule over the pin but What I do claim as my invention is So making the wrist that the ferrule which covers the screw-bolt or pin B shall he letinto the lace of crank A and held in place by the screw-bolt B, substantially as and for the purpose set forth.

JOHN M. LONG.

Witnesses: v

WM. GLoUGH, GEO. K. STILLMAN. 

